Concrete floor structure



! u". 5*? Q:- 1 3. .31.8 H. F. YOUNG RETE FLOOR STRUCTURE r' n Merit1851 CONC Filfied April 25, 1931 ATTORNEY S Patented Dec. 12, 1933PATENT OFFICE UNITED STATES one-half to Leonie S. Young,

Mich.

Kalamazoo,

Application April 25, 1931. Serial No. 532,835

' 10 Claims.

The objects of the invention are:

First, to provide a simple and eiiective concrete floor which utilizespre-cast concrete joists in its construction.

Second, to provide such a floor which is substantially monolithic in itseffect.

Third, to provide an improved construction of girder connection withsuch floor.

Fourth, to provide an improved wall connection in such floor.

Fifth, to provide improved bridging in such a floor.

Objects pertaining to details and economies of construction andoperation will appear from the description to follow. A preferredembodiment of my invention is illustrated in the accompanying drawing,in which:

Fig. 1 is an isometric fragmentary perspective view of a floor made inaccordance with my invention, the floor slabbeing broken away to showdetails and the disposition and arrangement of the pre-cast joists beingshown by dotted lines.

Fig. 2 is a detail transverse sectional View through one of the joistsand the floor slab, showing the engagement of the joist and slab.

Fig. 3 is an enlarged detail end sectional view showing the invention asapplied to a steel girder structure, the steel girder constituting ineifect the concrete reinforcement.

In the drawing, 1 indicates pre-cast joists made in the manner indicatedin my concurrent patent application. 2 is a concrete girder having theusual reinforcement 21 or any form of reinforcement such as would beobtained by the use of a steel girder 22, see Fig. 3. The girder has theextensions 23, 23 obliquely upward at each side between the said joists,the ends of the preformed joists projecting into the body of the saidgirder. The floor slab 4 is poured at the same time that the girder ispoured and is monolithic with it and embraces the ends of the precastjoists. A precisely similar wall support 3 is provided for engaging andsupporting the ends of the joists on the wall. This consists of a mainbody portion 3 with upwardly inclined part 31 between the joists. Thebridging consists of a transverse block 5 between the joists poured andformed integral with the floor slab. The floor slab 4 is formed withextensions 43 downward to embrace the head and form bond with the headof the joist 1. This has the effect of making substantially a monolithicstructure, although the joists are pre-cast.

Reinforcement rods 41 are disposed in the floor slab parallel to thejoists and over the top of the girders, extending about one-third of thejoist span each side of the girder and afiording cantilever support tothe joist and slab and providing continuity of the entire structure.Reinforcement rods 42 are continuous from joist to joist extending insuitably spaced relation over the entire floor slab.

This is the floor which is the result of the use of the improved formsand method referred to in my concurrent application. However, thisstructure can be produced by the use of the in vention described in myfurther concurrent application in which rib-lath are made use of informing the base and support of a concrete floor. Whether the floor isformed by the molds or by the rib-lath method is immaterial, the resultsare substantially the same.

In Fig. 3 I show an I-beam girder 22 as the reinforcing member for theconcrete, the pro-cast joists being made use of in the same way as inthe method illustrated in Fig. 1.

When short joists are made use of the bridging 5 can be dispensed with.A very good floor can be produced without the extensions 43 embracingthe top of the joists, but a very thorough bond is secured by theseextensions, making a very strong construction and making it possible touse comparatively long joists without the use of the bridging. Bridgingand that part can be made use of no matter how the ends of the joistsare supported. 35

I desire to claim my invention specifically and broadly as pointed outin the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A concrete floor formed with pre-cast joists having wall and girdersupports having upwardly and laterally extending portions between thesaid joists and extending between the said joists and embracing thesame, and a bridging formed between the upper parts of said joists, thefloor slab being formed with extensions embracing the heads of the saidjoists, the said concrete being continuous and embracing the ends ofsaid joists.

2. A concrete floor formed with pre-cast joists having wall and girdersupports between the said joists and extending between the said joistsand embracing the same, and a bridging formed between the upper parts ofsaid joists, the floor slab being formed with extensions embracing theheads of the said joists, the said concrete being continuous andembracing the ends of said joists.

3. In a concrete floor structure, the combination of pre-cast joists, agirder with upwardly laterally extending portions, and a floor slabformed integral therewith, the concrete formation embracing the ends ofthe said joists.

4. In a concrete floor structure, the combination of pre-cast joists, agirder, and a floor slab formed integral with said girder, the concreteembracing the ends 01' the said joists.

5. A concrete floor structure formed of pre-cast joists with a floorslab having engaging extensions embracing each side of the head of thejoists with a cement to cement bond therebetween.

6. A concrete floor construction consisting of pre-cast joists, a floorslab, and bridging between the said joists formed integral with the saidfloor slab.

7. A concrete floor formed with pre-cast joists having wall and girdersupports having upwardly and laterally extending portiofis extendingbetween the said joists and embracing the same, the floor slab beingformed with extensions embracing the heads of the said joists, the saidconcrete being continuous and embracing the ends of said joists.

S. A concrete floor formed with pre-cast joists having wall and girdersupports extending between the said joists and embracing the same, thefloor slab being formed with extensions embracing the heads of the saidjoists, the said concrete being continuous and embracing the ends 01said joists.

9. A concrete floor formed with pre-cast joists having girder supportsextending between the said joists and embracing the same, a floor slabformed with embracing portions for the heads of the said joists, theconcrete being continuous and embracing the ends of said joists, andreinforcement rods in the floor slab above the said girder parallel tothe said joists affording cantilever support and continuity.

10. A concrete floor formed with pre-cast joists having girder supportsextending between the said joists and embracing the same, a floor slabformed with embracing portions for the heads of the said joists, andreinforcement rods in the floor slab above the said girder parallel tothe said joists affording cantilever support and continuity.

HOWARD F. YOUNG.

DISCLAIMER Estate of Hereby disclaim claims 4,

said Howard F. licensee, Lzth-I-Bar Company? 5, and 8 of said LettersPatent.

[Qflicial Gazette October 20, 1942.]

